1 /* $OpenBSD: inet.c,v 1.3 1996/06/26 05:37:21 deraadt Exp $ */ 2 /* $NetBSD: inet.c,v 1.14 1995/10/03 21:42:37 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "from: @(#)inet.c 8.4 (Berkeley) 4/20/94"; 40 #else 41 static char *rcsid = "$OpenBSD: inet.c,v 1.3 1996/06/26 05:37:21 deraadt Exp $"; 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/queue.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/mbuf.h> 50 #include <sys/protosw.h> 51 52 #include <net/route.h> 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #include <netinet/in_pcb.h> 57 #include <netinet/ip_icmp.h> 58 #include <netinet/icmp_var.h> 59 #include <netinet/igmp_var.h> 60 #include <netinet/ip_var.h> 61 #include <netinet/tcp.h> 62 #include <netinet/tcpip.h> 63 #include <netinet/tcp_seq.h> 64 #define TCPSTATES 65 #include <netinet/tcp_fsm.h> 66 #include <netinet/tcp_timer.h> 67 #include <netinet/tcp_var.h> 68 #include <netinet/tcp_debug.h> 69 #include <netinet/udp.h> 70 #include <netinet/udp_var.h> 71 72 #include <arpa/inet.h> 73 #include <netdb.h> 74 #include <stdio.h> 75 #include <string.h> 76 #include <unistd.h> 77 #include "netstat.h" 78 79 struct inpcb inpcb; 80 struct tcpcb tcpcb; 81 struct socket sockb; 82 83 char *inetname __P((struct in_addr *)); 84 void inetprint __P((struct in_addr *, int, char *)); 85 86 /* 87 * Print a summary of connections related to an Internet 88 * protocol. For TCP, also give state of connection. 89 * Listening processes (aflag) are suppressed unless the 90 * -a (all) flag is specified. 91 */ 92 void 93 protopr(off, name) 94 u_long off; 95 char *name; 96 { 97 struct inpcbtable table; 98 register struct inpcb *head, *next, *prev; 99 struct inpcb inpcb; 100 int istcp; 101 static int first = 1; 102 103 if (off == 0) 104 return; 105 istcp = strcmp(name, "tcp") == 0; 106 kread(off, (char *)&table, sizeof table); 107 prev = head = 108 (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue.cqh_first; 109 next = table.inpt_queue.cqh_first; 110 111 while (next != head) { 112 kread((u_long)next, (char *)&inpcb, sizeof inpcb); 113 if (inpcb.inp_queue.cqe_prev != prev) { 114 printf("???\n"); 115 break; 116 } 117 prev = next; 118 next = inpcb.inp_queue.cqe_next; 119 120 if (!aflag && 121 inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) 122 continue; 123 kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); 124 if (istcp) { 125 kread((u_long)inpcb.inp_ppcb, 126 (char *)&tcpcb, sizeof (tcpcb)); 127 } 128 if (first) { 129 printf("Active Internet connections"); 130 if (aflag) 131 printf(" (including servers)"); 132 putchar('\n'); 133 if (Aflag) 134 printf("%-8.8s ", "PCB"); 135 printf(Aflag ? 136 "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : 137 "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", 138 "Proto", "Recv-Q", "Send-Q", 139 "Local Address", "Foreign Address", "(state)"); 140 first = 0; 141 } 142 if (Aflag) 143 if (istcp) 144 printf("%8x ", inpcb.inp_ppcb); 145 else 146 printf("%8x ", prev); 147 printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, 148 sockb.so_snd.sb_cc); 149 inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name); 150 inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name); 151 if (istcp) { 152 if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) 153 printf(" %d", tcpcb.t_state); 154 else 155 printf(" %s", tcpstates[tcpcb.t_state]); 156 } 157 putchar('\n'); 158 } 159 } 160 161 /* 162 * Dump TCP statistics structure. 163 */ 164 void 165 tcp_stats(off, name) 166 u_long off; 167 char *name; 168 { 169 struct tcpstat tcpstat; 170 171 if (off == 0) 172 return; 173 printf ("%s:\n", name); 174 kread(off, (char *)&tcpstat, sizeof (tcpstat)); 175 176 #define p(f, m) if (tcpstat.f || sflag <= 1) \ 177 printf(m, tcpstat.f, plural(tcpstat.f)) 178 #define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ 179 printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) 180 #define p3(f, m) if (tcpstat.f || sflag <= 1) \ 181 printf(m, tcpstat.f, plurales(tcpstat.f)) 182 183 p(tcps_sndtotal, "\t%d packet%s sent\n"); 184 p2(tcps_sndpack,tcps_sndbyte, 185 "\t\t%d data packet%s (%d byte%s)\n"); 186 p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, 187 "\t\t%d data packet%s (%d byte%s) retransmitted\n"); 188 p2(tcps_sndacks, tcps_delack, 189 "\t\t%d ack-only packet%s (%d delayed)\n"); 190 p(tcps_sndurg, "\t\t%d URG only packet%s\n"); 191 p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); 192 p(tcps_sndwinup, "\t\t%d window update packet%s\n"); 193 p(tcps_sndctrl, "\t\t%d control packet%s\n"); 194 p(tcps_rcvtotal, "\t%d packet%s received\n"); 195 p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); 196 p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); 197 p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); 198 p2(tcps_rcvpack, tcps_rcvbyte, 199 "\t\t%d packet%s (%d byte%s) received in-sequence\n"); 200 p2(tcps_rcvduppack, tcps_rcvdupbyte, 201 "\t\t%d completely duplicate packet%s (%d byte%s)\n"); 202 p(tcps_pawsdrop, "\t\t%d old duplicate packet%s\n"); 203 p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, 204 "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); 205 p2(tcps_rcvoopack, tcps_rcvoobyte, 206 "\t\t%d out-of-order packet%s (%d byte%s)\n"); 207 p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, 208 "\t\t%d packet%s (%d byte%s) of data after window\n"); 209 p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); 210 p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); 211 p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); 212 p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); 213 p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); 214 p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); 215 p(tcps_connattempt, "\t%d connection request%s\n"); 216 p(tcps_accepts, "\t%d connection accept%s\n"); 217 p(tcps_connects, "\t%d connection%s established (including accepts)\n"); 218 p2(tcps_closed, tcps_drops, 219 "\t%d connection%s closed (including %d drop%s)\n"); 220 p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); 221 p2(tcps_rttupdated, tcps_segstimed, 222 "\t%d segment%s updated rtt (of %d attempt%s)\n"); 223 p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); 224 p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); 225 p(tcps_persisttimeo, "\t%d persist timeout%s\n"); 226 p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); 227 p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); 228 p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); 229 p(tcps_predack, "\t%d correct ACK header prediction%s\n"); 230 p(tcps_preddat, "\t%d correct data packet header prediction%s\n"); 231 p3(tcps_pcbhashmiss, "\t%d PCB cache miss%s\n"); 232 #undef p 233 #undef p2 234 #undef p3 235 } 236 237 /* 238 * Dump UDP statistics structure. 239 */ 240 void 241 udp_stats(off, name) 242 u_long off; 243 char *name; 244 { 245 struct udpstat udpstat; 246 u_long delivered; 247 248 if (off == 0) 249 return; 250 kread(off, (char *)&udpstat, sizeof (udpstat)); 251 printf("%s:\n", name); 252 #define p(f, m) if (udpstat.f || sflag <= 1) \ 253 printf(m, udpstat.f, plural(udpstat.f)) 254 p(udps_ipackets, "\t%u datagram%s received\n"); 255 p(udps_hdrops, "\t%u with incomplete header\n"); 256 p(udps_badlen, "\t%u with bad data length field\n"); 257 p(udps_badsum, "\t%u with bad checksum\n"); 258 p(udps_noport, "\t%u dropped due to no socket\n"); 259 p(udps_noportbcast, "\t%u broadcast/multicast datagram%s dropped due to no socket\n"); 260 p(udps_fullsock, "\t%u dropped due to full socket buffers\n"); 261 delivered = udpstat.udps_ipackets - 262 udpstat.udps_hdrops - 263 udpstat.udps_badlen - 264 udpstat.udps_badsum - 265 udpstat.udps_noport - 266 udpstat.udps_noportbcast - 267 udpstat.udps_fullsock; 268 if (delivered || sflag <= 1) 269 printf("\t%u delivered\n", delivered); 270 p(udps_opackets, "\t%u datagram%s output\n"); 271 #undef p 272 } 273 274 /* 275 * Dump IP statistics structure. 276 */ 277 void 278 ip_stats(off, name) 279 u_long off; 280 char *name; 281 { 282 struct ipstat ipstat; 283 284 if (off == 0) 285 return; 286 kread(off, (char *)&ipstat, sizeof (ipstat)); 287 printf("%s:\n", name); 288 289 #define p(f, m) if (ipstat.f || sflag <= 1) \ 290 printf(m, ipstat.f, plural(ipstat.f)) 291 292 p(ips_total, "\t%u total packet%s received\n"); 293 p(ips_badsum, "\t%u bad header checksum%s\n"); 294 p(ips_toosmall, "\t%u with size smaller than minimum\n"); 295 p(ips_tooshort, "\t%u with data size < data length\n"); 296 p(ips_badhlen, "\t%u with header length < data size\n"); 297 p(ips_badlen, "\t%u with data length < header length\n"); 298 p(ips_badoptions, "\t%u with bad options\n"); 299 p(ips_badvers, "\t%u with incorrect version number\n"); 300 p(ips_fragments, "\t%u fragment%s received\n"); 301 p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n"); 302 p(ips_badfrags, "\t%u malformed fragment%s dropped\n"); 303 p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n"); 304 p(ips_reassembled, "\t%u packet%s reassembled ok\n"); 305 p(ips_delivered, "\t%u packet%s for this host\n"); 306 p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n"); 307 p(ips_forward, "\t%u packet%s forwarded\n"); 308 p(ips_cantforward, "\t%u packet%s not forwardable\n"); 309 p(ips_redirectsent, "\t%u redirect%s sent\n"); 310 p(ips_localout, "\t%u packet%s sent from this host\n"); 311 p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n"); 312 p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n"); 313 p(ips_noroute, "\t%u output packet%s discarded due to no route\n"); 314 p(ips_fragmented, "\t%u output datagram%s fragmented\n"); 315 p(ips_ofragments, "\t%u fragment%s created\n"); 316 p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n"); 317 #undef p 318 } 319 320 static char *icmpnames[] = { 321 "echo reply", 322 "#1", 323 "#2", 324 "destination unreachable", 325 "source quench", 326 "routing redirect", 327 "#6", 328 "#7", 329 "echo", 330 "#9", 331 "#10", 332 "time exceeded", 333 "parameter problem", 334 "time stamp", 335 "time stamp reply", 336 "information request", 337 "information request reply", 338 "address mask request", 339 "address mask reply", 340 }; 341 342 /* 343 * Dump ICMP statistics. 344 */ 345 void 346 icmp_stats(off, name) 347 u_long off; 348 char *name; 349 { 350 struct icmpstat icmpstat; 351 register int i, first; 352 353 if (off == 0) 354 return; 355 kread(off, (char *)&icmpstat, sizeof (icmpstat)); 356 printf("%s:\n", name); 357 358 #define p(f, m) if (icmpstat.f || sflag <= 1) \ 359 printf(m, icmpstat.f, plural(icmpstat.f)) 360 361 p(icps_error, "\t%u call%s to icmp_error\n"); 362 p(icps_oldicmp, 363 "\t%u error%s not generated 'cuz old message was icmp\n"); 364 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 365 if (icmpstat.icps_outhist[i] != 0) { 366 if (first) { 367 printf("\tOutput histogram:\n"); 368 first = 0; 369 } 370 printf("\t\t%s: %u\n", icmpnames[i], 371 icmpstat.icps_outhist[i]); 372 } 373 p(icps_badcode, "\t%u message%s with bad code fields\n"); 374 p(icps_tooshort, "\t%u message%s < minimum length\n"); 375 p(icps_checksum, "\t%u bad checksum%s\n"); 376 p(icps_badlen, "\t%u message%s with bad length\n"); 377 for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) 378 if (icmpstat.icps_inhist[i] != 0) { 379 if (first) { 380 printf("\tInput histogram:\n"); 381 first = 0; 382 } 383 printf("\t\t%s: %u\n", icmpnames[i], 384 icmpstat.icps_inhist[i]); 385 } 386 p(icps_reflect, "\t%u message response%s generated\n"); 387 #undef p 388 } 389 390 /* 391 * Dump IGMP statistics structure. 392 */ 393 void 394 igmp_stats(off, name) 395 u_long off; 396 char *name; 397 { 398 struct igmpstat igmpstat; 399 400 if (off == 0) 401 return; 402 kread(off, (char *)&igmpstat, sizeof (igmpstat)); 403 printf("%s:\n", name); 404 405 #define p(f, m) if (igmpstat.f || sflag <= 1) \ 406 printf(m, igmpstat.f, plural(igmpstat.f)) 407 #define py(f, m) if (igmpstat.f || sflag <= 1) \ 408 printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") 409 p(igps_rcv_total, "\t%u message%s received\n"); 410 p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n"); 411 p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n"); 412 py(igps_rcv_queries, "\t%u membership quer%s received\n"); 413 py(igps_rcv_badqueries, "\t%u membership quer%s received with invalid field(s)\n"); 414 p(igps_rcv_reports, "\t%u membership report%s received\n"); 415 p(igps_rcv_badreports, "\t%u membership report%s received with invalid field(s)\n"); 416 p(igps_rcv_ourreports, "\t%u membership report%s received for groups to which we belong\n"); 417 p(igps_snd_reports, "\t%u membership report%s sent\n"); 418 #undef p 419 #undef py 420 } 421 422 /* 423 * Pretty print an Internet address (net address + port). 424 * If the nflag was specified, use numbers instead of names. 425 */ 426 void 427 inetprint(in, port, proto) 428 register struct in_addr *in; 429 int port; 430 char *proto; 431 { 432 struct servent *sp = 0; 433 char line[80], *cp; 434 int width; 435 436 sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); 437 cp = index(line, '\0'); 438 if (!nflag && port) 439 sp = getservbyport((int)port, proto); 440 if (sp || port == 0) 441 sprintf(cp, "%.8s", sp ? sp->s_name : "*"); 442 else 443 sprintf(cp, "%d", ntohs((u_short)port)); 444 width = Aflag ? 18 : 22; 445 printf(" %-*.*s", width, width, line); 446 } 447 448 /* 449 * Construct an Internet address representation. 450 * If the nflag has been supplied, give 451 * numeric value, otherwise try for symbolic name. 452 */ 453 char * 454 inetname(inp) 455 struct in_addr *inp; 456 { 457 register char *cp; 458 static char line[50]; 459 struct hostent *hp; 460 struct netent *np; 461 static char domain[MAXHOSTNAMELEN + 1]; 462 static int first = 1; 463 464 if (first && !nflag) { 465 first = 0; 466 if (gethostname(domain, MAXHOSTNAMELEN) == 0 && 467 (cp = index(domain, '.'))) 468 (void) strcpy(domain, cp + 1); 469 else 470 domain[0] = 0; 471 } 472 cp = 0; 473 if (!nflag && inp->s_addr != INADDR_ANY) { 474 int net = inet_netof(*inp); 475 int lna = inet_lnaof(*inp); 476 477 if (lna == INADDR_ANY) { 478 np = getnetbyaddr(net, AF_INET); 479 if (np) 480 cp = np->n_name; 481 } 482 if (cp == 0) { 483 hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); 484 if (hp) { 485 if ((cp = index(hp->h_name, '.')) && 486 !strcmp(cp + 1, domain)) 487 *cp = 0; 488 cp = hp->h_name; 489 } 490 } 491 } 492 if (inp->s_addr == INADDR_ANY) 493 strcpy(line, "*"); 494 else if (cp) 495 strcpy(line, cp); 496 else { 497 inp->s_addr = ntohl(inp->s_addr); 498 #define C(x) ((x) & 0xff) 499 sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), 500 C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); 501 } 502 return (line); 503 } 504